Manufacture of alloys.



I construction of marine engines,

GEORGE ESKHOLME BUTTENSHAW, OF MANCHESTER, ENGLAND.

"MANUFACTURE oF ALLOYS- No.854,4621 I Specification of Letters Patent.

Patented may 21, 1907.

. Application filed Iiovember 15.1905. Serial No. 287.522.

To all'wham it may concern: Be it known that I, GEORGE EsKHoLMEBUTTENSHAW, a subject of the King of Great Britain and Ireland, residingat Beechwood,

Chorlton-cum-Hardy, Manchester,- in the county of Lancaster and Kingdomof Great Britain and Ireland, have invented new and useful Improvementsin the Manufacture of Alloys, of which the following'is a specification.Y

The object of my invention is to produce articles in an alloy suitablefor use in the I uinps, sea valves, torpedo-tubes, and the ike, whichare brought into contact with salt water and which shall not'be liableto oxidize or set up galvlanic action in the presence of iron and stee.i

I carry out my invention by employing a white alloy which gives amicrostructure showing a strong primary net work formed in a hardmatrix, of which either compound satisfies a chemical combinationwithout the existence of any free metal likely to act as a base inthe'formation of metallic salts in sea water. The undermentionedconstituents arranged in the following approximate proportions willeffect this object: copper 40, zinc 41, nickel 10, lead 3.5, phosphortin 1, alu minium 0.15. The proportions of the constituents 'here givenmay for certain requirements be slightly modified, as for atestrequiring increased or decreased elongation the atomic proportionsof .zinc with copper would be made by a variation of 2% in the zinc, orin some cases whereincreased hardness is'required the addition of 0.1 to0.2% parts of manganese may be made with advantage.

I ave found that-instead of a direct mcltingof the constitutents abetter result is obtained by. employing a sequence of alloys. I firstobtaina combinatlon of alloys in the first stage by obtaining acombination of two atomic proportions of copper with one atomicproportion of nickel, which combination is assisted by the presence of0.15 of aluminium, which when added to the fused metals increases thetemperature, facilitating the production of the alloying material, 30per cent of this alloy 1s then added to the fo lowing copper 23.54, zinc43.86,- lead 1.60, tin 0.95, phosphorus 0.05. The alloy as finallyformed consists of the following approximate proportion of-itsconstituents, copper 43.19, zinc 43.86, I11Gk6l 10.20, lead 1.60, tin0.95, phosphorus 0.05,

aluminium 0.15.

By the modified method of producing my improved alloy in some cases. asfor a; test requiring increased or decreased elongation, in addition tothe atomic proportions of zinc with copper being varied, a variation of1% per cent in the lead may likewise be made with advantage.

What I claim and desire to secure. by LettersPatent is An alloyconsistingof metals in the following proximate proportions by Weight:copper, 40 to 43.19%, zinc, 41 to 43.86%, nickel,

10 to 10.20%, lead, 1 to 3.5%, phosphor tin, 1 aluminium, 0.15%,substantially as, and for the purpose, set forth.

In witness whereof I have hereunto signed my name this 20th day ofOctober 1905, in the presence of two subscribing witnesses;

GEORGE ESKHOLME BUTTENSHAW.

Witnesses:

JULIUS RoYKE, HUGO LIEBELT.

